/*
 * Copyright (c) 2014, Ege University
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 *
 * - Redistributions of source code must retain the above copyright
 *   notice, this list of conditions and the following disclaimer.
 * - Redistributions in binary form must reproduce the above copyright
 *   notice, this list of conditions and the following disclaimer in the
 *   documentation and/or other materials provided with the
 *   distribution.
 * - Neither the name of the copyright holder nor the names of
 *   its contributors may be used to endorse or promote products derived
 *   from this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL
 * THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT,
 * INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
 * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED
 * OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * @author Kasım Sinan YILDIRIM (sinanyil81@gmail.com)
 *
 */
package simulations.synchronization.avts;

import simit.hardware.Register32;
import simulations.shared.avt.AdaptiveValueTracker;

public class LogicalClock {

	public Register32 value = new Register32();

	public AdaptiveValueTracker rate = new AdaptiveValueTracker(-0.0002f, 0.0002f, 0.0f, 0.000000000001f, 0.00001f);
	Register32 updateLocalTime = new Register32();
	
	public LogicalClock(){

	}

	public void update(Register32 local) {
		int timePassed = local.subtract(updateLocalTime).toInteger();
		timePassed += (int) (((float) timePassed) * rate.getValue());

		value = value.add(timePassed);
		this.updateLocalTime = new Register32(local);
	}

	public Register32 getValue(Register32 local) {
		int timePassed = local.subtract(updateLocalTime).toInteger();
		timePassed += (int) (((float) timePassed) * rate.getValue());

		return value.add(new Register32(timePassed));
	}

	public void setValue(Register32 time, Register32 local) {
		value = new Register32(time);
		this.updateLocalTime = new Register32(local);
	}
}
